@article{Rafat-2022-The,
title = "The definition of the non-growing season matters: a case study of net ecosystem carbon exchange from a Canadian peatland",
author = "Rafat, Arash and
Byun, Eunji and
Rezanezhad, Fereidoun and
Quinton, W. L. and
Humphreys, Elyn and
Webster, Kara and
Cappellen, Philippe Van",
journal = "Environmental Research Communications, Volume 4, Issue 2",
volume = "4",
number = "2",
year = "2022",
publisher = "IOP Publishing",
url = "https://gwf-uwaterloo.github.io/gwf-publications/G22-9001",
doi = "10.1088/2515-7620/ac53c2",
pages = "021003",
abstract = "Abstract Climate change is a threat to the 500 Gt carbon stored in northern peatlands. As the region warms, the rise in mean temperature is more pronounced during the non-growing season (NGS, i.e., winter and parts of the shoulder seasons) when net ecosystem loss of carbon dioxide (CO 2 ) occurs. Many studies have investigated the impacts of climate warming on NGS CO 2 emissions, yet there is a lack of consistency amongst researchers in how the NGS period is defined. This complicates the interpretation of NGS CO 2 emissions and hinders our understanding of seasonal drivers of important terrestrial carbon exchange processes. Here, we analyze the impact of alternative definitions of the NGS for a peatland site with multiple years of CO 2 flux records. Three climatic parameters were considered to define the NGS: air temperature, soil temperature, and snow cover. Our findings reveal positive correlations between estimates of the cumulative non-growing season net ecosystem CO 2 exchange (NGS-NEE) and the length of the NGS for each alternative definition, with the greatest proportion of variability explained using snow cover ( R 2 = 0.89, p {\textless} 0.001), followed by air temperature ( R 2 = 0.79, p {\textless} 0.001) and soil temperature ( R 2 = 0.54, p = 0.006). Using these correlations, we estimate average daily NGS CO 2 emitted between 1.42 and 1.90 gCO 2 m −2 , depending on which NGS definition is used. Our results highlight the need to explicitly define the NGS based on available climatic parameters to account for regional climate and ecosystem variability.",
}
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<abstract>Abstract Climate change is a threat to the 500 Gt carbon stored in northern peatlands. As the region warms, the rise in mean temperature is more pronounced during the non-growing season (NGS, i.e., winter and parts of the shoulder seasons) when net ecosystem loss of carbon dioxide (CO 2 ) occurs. Many studies have investigated the impacts of climate warming on NGS CO 2 emissions, yet there is a lack of consistency amongst researchers in how the NGS period is defined. This complicates the interpretation of NGS CO 2 emissions and hinders our understanding of seasonal drivers of important terrestrial carbon exchange processes. Here, we analyze the impact of alternative definitions of the NGS for a peatland site with multiple years of CO 2 flux records. Three climatic parameters were considered to define the NGS: air temperature, soil temperature, and snow cover. Our findings reveal positive correlations between estimates of the cumulative non-growing season net ecosystem CO 2 exchange (NGS-NEE) and the length of the NGS for each alternative definition, with the greatest proportion of variability explained using snow cover ( R 2 = 0.89, p \textless 0.001), followed by air temperature ( R 2 = 0.79, p \textless 0.001) and soil temperature ( R 2 = 0.54, p = 0.006). Using these correlations, we estimate average daily NGS CO 2 emitted between 1.42 and 1.90 gCO 2 m −2 , depending on which NGS definition is used. Our results highlight the need to explicitly define the NGS based on available climatic parameters to account for regional climate and ecosystem variability.</abstract>
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%0 Journal Article
%T The definition of the non-growing season matters: a case study of net ecosystem carbon exchange from a Canadian peatland
%A Rafat, Arash
%A Byun, Eunji
%A Rezanezhad, Fereidoun
%A Quinton, W. L.
%A Humphreys, Elyn
%A Webster, Kara
%A Cappellen, Philippe Van
%J Environmental Research Communications, Volume 4, Issue 2
%D 2022
%V 4
%N 2
%I IOP Publishing
%F Rafat-2022-The
%X Abstract Climate change is a threat to the 500 Gt carbon stored in northern peatlands. As the region warms, the rise in mean temperature is more pronounced during the non-growing season (NGS, i.e., winter and parts of the shoulder seasons) when net ecosystem loss of carbon dioxide (CO 2 ) occurs. Many studies have investigated the impacts of climate warming on NGS CO 2 emissions, yet there is a lack of consistency amongst researchers in how the NGS period is defined. This complicates the interpretation of NGS CO 2 emissions and hinders our understanding of seasonal drivers of important terrestrial carbon exchange processes. Here, we analyze the impact of alternative definitions of the NGS for a peatland site with multiple years of CO 2 flux records. Three climatic parameters were considered to define the NGS: air temperature, soil temperature, and snow cover. Our findings reveal positive correlations between estimates of the cumulative non-growing season net ecosystem CO 2 exchange (NGS-NEE) and the length of the NGS for each alternative definition, with the greatest proportion of variability explained using snow cover ( R 2 = 0.89, p \textless 0.001), followed by air temperature ( R 2 = 0.79, p \textless 0.001) and soil temperature ( R 2 = 0.54, p = 0.006). Using these correlations, we estimate average daily NGS CO 2 emitted between 1.42 and 1.90 gCO 2 m −2 , depending on which NGS definition is used. Our results highlight the need to explicitly define the NGS based on available climatic parameters to account for regional climate and ecosystem variability.
%R 10.1088/2515-7620/ac53c2
%U https://gwf-uwaterloo.github.io/gwf-publications/G22-9001
%U https://doi.org/10.1088/2515-7620/ac53c2
%P 021003
Markdown (Informal)
[The definition of the non-growing season matters: a case study of net ecosystem carbon exchange from a Canadian peatland](https://gwf-uwaterloo.github.io/gwf-publications/G22-9001) (Rafat et al., GWF 2022)
ACL
- Arash Rafat, Eunji Byun, Fereidoun Rezanezhad, W. L. Quinton, Elyn Humphreys, Kara Webster, and Philippe Van Cappellen. 2022. The definition of the non-growing season matters: a case study of net ecosystem carbon exchange from a Canadian peatland. Environmental Research Communications, Volume 4, Issue 2, 4(2):021003.
